Liquid crystal display device and method of driving the same

Abstract

A liquid crystal display device and a method of driving the same include a display panel which has a first and a second surface facing each other, a plurality of first pixels which display an image on the first surface and a plurality of second pixels which display an image on the second surface, a data driver which supplies first and second data signals to the first pixels and the second pixels, respectively, and a gate driver which supplies gate signals to the first and second pixels. The gate driver and the data driver supply the gate signals and the first data signal to the plurality of first pixels in a first period, and supply the gate signals and the second data signal to the plurality of second pixels in a second period.

1 . A liquid crystal display device comprising:
 a display panel having first and second surfaces facing each other, a plurality of first pixels which display an image on the first surface and a plurality of second pixels which display an image on the second surface;   a data driver which supplies first data signals to the plurality of first pixels in a first period and second data signals to the plurality of second pixels in a second period; and   a gate driver comprising a first gate driving circuit which supplies a gate-on voltage to the plurality of first pixels in the first period and a second gate driving circuit which supplies the gate-on voltage to the plurality of second pixels in the second period.   
   
   
       2 . The liquid crystal display device of  claim 1 , wherein the plurality of first pixels and the plurality of second pixels are arranged alternately. 
   
   
       3 . The liquid crystal display device of  claim 1 , further comprising:
 a plurality of first gate lines connected to the plurality of first pixels; and   a plurality of second gate lines connected to the plurality of second pixels,   wherein the plurality of first and the plurality of second gate lines are arranged alternately.   
   
   
       4 . The liquid crystal display device of  claim 1 , wherein the first data signal comprises a number of values and the second data signal comprises a number of values, and the number of values which the first data signal comprises is not equal to the number of values which the second data signal comprises. 
   
   
       5 . The liquid crystal display device of  claim 1 , wherein at least one of the first and the second data signals comprise at least two values. 
   
   
       6 . The liquid crystal display device of  claim 1 , wherein the data driver comprises:
 a first data driving circuit which receives a first image signal, comprising a number of first bits, and generates the first data signal; and   a second data driving circuit which receives a second image signal, comprising a number of second bits, and generates the second data signal.   
   
   
       7 . The liquid crystal display device of  claim 6 , wherein the number of first bits in the first image signal is not equal to the number of second bits in the second image signal. 
   
   
       8 . The liquid crystal display device of  claim 7 , wherein the first data driving circuit selects one of at least three gray voltages and outputs the selected gray voltage as the first data signal, and the second data driving circuit selects one of at least two gray voltages and outputs the selected gray voltage as the second data signal. 
   
   
       9 . The liquid crystal display device of  claim 8 , wherein the first and second data driving circuits comprise output buffers which output the first data signal and the second data signal, respectively. 
   
   
       10 . The liquid crystal display device of  claim 1 , wherein the gate driver further comprises:
 an output terminal which sends a carry signal and;   an output buffer which outputs the gate-on voltages to the plurality of first and second gate lines.   
   
   
       11 . The liquid crystal display device of  claim 1 , wherein the first gate driving circuit and the second gate driving circuit are located at opposing ends of the plurality of first and the plurality of second gate lines, respectively. 
   
   
       12 . The liquid crystal display device of  claim 1 , further comprising a blanking period between the first period and the second period. 
   
   
       13 . The liquid crystal display device of  claim 1 , wherein the blanking period comprises at least two horizontal periods. 
   
   
       14 . The liquid crystal display device of  claim 1 , wherein the plurality of first pixels comprise a plurality of transmissive pixel electrodes and the plurality of second pixels comprise a plurality of reflective pixel electrodes. 
   
   
       15 . A method of driving a liquid crystal display device, the method comprising:
 sequentially supplying a gate-on voltage to a plurality of first pixels;   supplying a first data signal to the plurality of first pixels to display an image on a first surface of a display panel;   sequentially supplying the gate-on voltage to a plurality of second pixels, the plurality of first pixels and the plurality of second pixels being alternately disposed; and   supplying a second data signal to the plurality of second pixels to display an image on a second surface of the display panel.   
   
   
       16 . The method of  claim 15 , further comprising a blanking period. 
   
   
       17 . The method of  claim 16 , wherein the blanking period is at least two times as long as one duration of the gate-on voltage. 
   
   
       18 . The method of  claim 15 , wherein the method of supplying the first data signal to the plurality of first pixels comprises
 selecting a gray voltage corresponding to a first image signal from among at least three gray voltages, and   applying the selected gray voltage to the plurality of first pixels as the first data signal; and   the method of supplying the second data signal to the second pixels comprises   selecting a gray voltage corresponding to a second image signal from among at least two gray voltages, and   applying the selected gray voltage to the plurality of second pixels as the second data signal.   
   
   
       19 . The method of  claim 15 , wherein the plurality of first pixels comprise a plurality of transmissive pixel electrodes and the plurality of second pixels comprise a plurality of reflective pixel electrodes.